// TcpSocket.hpp
#pragma once
#include <iostream>
#include <cstring>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include "log.hpp"

enum {
    UsageErr = 1,
    SocketErr,
    BindErr,
    ListenErr,
    ConnectErr
};

// TODO
const int backlog = 10;

class TcpSocket
{
public:
    TcpSocket()
        :_sockfd(-1)
    {}
    ~TcpSocket()
    {
        close(_sockfd);
    }
public:
    void Socket()
    {
        _sockfd = socket(AF_INET, SOCK_STREAM, 0);
        if (_sockfd < 0)
        {
            lg(Fatal, "socket error, %s: %d", strerror(errno), errno);
            exit(SocketErr);
        }
        lg(Info, "socket success, sockfd: %d", _sockfd);
    }
    void Bind(uint16_t port)
    {
        struct sockaddr_in local;
        memset(&local, 0, sizeof(local));
        local.sin_family = AF_INET;
        local.sin_port = htons(port);
        local.sin_addr.s_addr = INADDR_ANY;

        if (bind(_sockfd, (struct sockaddr*)&local, sizeof(local)) < 0)
        {
            lg(Fatal, "bind error, %s: %d", strerror(errno), errno);
            exit(BindErr);
        }
    }
    void Listen()
    {
        if (listen(_sockfd, backlog) < 0)
        {
            lg(Fatal, "listen error, %s: %d", strerror(errno), errno);
            exit(ListenErr);
        }
    }
    int Accept(std::string *clientip, uint16_t *clientport)
    {
        struct sockaddr_in peer;
        socklen_t len = sizeof(peer);
        int newfd = accept(_sockfd, (struct sockaddr*)&peer, &len);
        if (newfd < 0)
        {
            lg(Warning, "accept error, %s: %d", strerror(errno), errno);
            return -1;
        }
        // lg(Info, "accept success, fd: %d", newfd);

        char ipstr[16];
        inet_ntop(AF_INET, &peer.sin_addr, ipstr, sizeof(ipstr));
        *clientip = ipstr;
        *clientport = ntohs(peer.sin_port);

        return newfd;
    }
    bool Connect(const std::string &ip, uint16_t port)
    {
        struct sockaddr_in peer;
        memset(&peer, 0, sizeof(peer));
        peer.sin_family = AF_INET;
        peer.sin_port = htons(port);
        peer.sin_addr.s_addr = inet_addr(ip.c_str());
        // inet_pton(AF_INET, ip.c_str(), &peer.sin_addr);

        if (connect(_sockfd, (struct sockaddr*)&peer, sizeof(peer)) < 0)
        {
            std::cerr << "connect to " << ip << ":" << port << " error." << std::endl;
            return false;
        }
        return true;
    }
    int getfd()
    {
        return _sockfd;
    }
    int Close()
    {
        return close(_sockfd);
    }
private:
    int _sockfd;
};